Details

The colour parameters were made independent of the viewport definitions not long ago which was supposed to give the opportunity to e.g. change the line colour within the viewport - and I asked in IRC - should also have given the opportunity to put the colours in conditionals (e.g. you could make the volume display turn red if volume is set to above 0dB etc.).

I tried this because it would greatly simplify my WPS which uses these "indicator" colours but gets the effect with the help of conditional viewports for now.

For a first try I only wrote the following test.wps which should display the word "Test" in magenta if the hold switch is off and in cyan if it is on:
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%wd
%V(0,0,-,30,1)%?mh<%Vf(00FFFF)|%Vf(FF00FF)>
Test

(also tried putting the %?mh conditional on its own line)
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When entering the WPS (hold off), the magenta "Test" is displayed correcty, if I switch hold the text disappears and won't come back anymore however often I switch hold on or off. This was tested in an X5 sim but also with grey shades in an M5 sim and on target.

I tried what was suggested in the first closing message (see History tab here ^ ) adapted to greyshades for my M5 and by using %pc as dynamic tag.

My new test.wps looks as follows: http://pastebin.com/W43dnVAd but it didn't work. The TTT or GGG inside the conditional but behind the %Vf tags didn't show up at all but I'm not sure if they should. The foreground greyshade didn't change, it just stayed black (0).